Correct Answer: C) rickets

Explanation

Vitamin D is an important nutrient that our body needs to stay healthy. If we don't get enough vitamin D, we may develop certain health problems. This question is asking about the deficiency of vitamin D and what health problem it can cause. The options are scurvy, pellagra, rickets, beriberi, and polio. Out of these options, the correct answer is rickets. Rickets is a condition that affects the bones, making them weak and soft. It is caused by a lack of vitamin D, which is needed for the body to absorb calcium and build strong bones. To prevent rickets and other health problems caused by vitamin D deficiency, it is important to get enough vitamin D from our diet or from sunlight. Foods that are rich in vitamin D include fatty fish, egg yolks, and fortified milk and cereal. Spending time outside in the sun can also help our body produce vitamin D. In summary, the deficiency of vitamin D can lead to health problems, including rickets which affects our bones. To prevent such problems, we should ensure we get enough vitamin D from our diet and/or sunlight.

Correct Answer: D. Savanna

Explanation

The characteristics listed describe a savanna. Deserts can also have pronounced periods of rain and dryness but are not dominated by grasses and not populated by large migratory animals. Tropical rainforests and deciduous forests are dominated by trees and tundras tend to be colder and may not receive much rainfall, but often have moist soil due to low evaporation rates.

Correct Answer: D. drew up his laws of inheritance based on his knowledge of chromosomes

Correct Answer: B. heart beat

Correct Answer: B. easy movement

Correct Answer: D. Body structure

Correct Answer: A. monkeys

Correct Answer: C. bile emulsifies fat and oil

Correct Answer: B. phloem

Correct Answer: B) hooks and suckers

Explanation

A tapeworm is a type of parasite that lives in the intestine of its host. The question is asking how a tapeworm attaches itself to the intestine of its host. The options are neck and sucker, hooks and suckers, rostellum and suckers, proglottis and neck, and rostellum, hooks and suckers. The correct answer is hooks and suckers. Tapeworms have hooks and suckers on their head, which they use to attach themselves to the intestinal wall of their host. The hooks help to anchor the tapeworm while the suckers help to create a seal between the tapeworm and the intestinal wall. It is important to note that tapeworms can cause health problems in their hosts and should be treated by a medical professional. Additionally, it is important to practice good hygiene and food safety to prevent tapeworm infections. Overall, tapeworms use hooks and suckers to attach themselves to the intestine of their host, causing health problems if left untreated.